Merge pull request #5704 from wekan/dependabot/github_actions/docker/build-push-action-6.15.0

Bump docker/build-push-action from 6.14.0 to 6.15.0

.github/workflows/docker-publish.yml

@@ -55,7 +55,7 @@ jobs:
       # Build and push Docker image with Buildx (don't push on PR)
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
-        uses: docker/build-push-action@0adf9959216b96bec444f325f1e493d4aa344497
+        uses: docker/build-push-action@471d1dc4e07e5cdedd4c2171150001c434f0b7a4
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}